Red and blue but im not sure abt the percentage.
Answer:
The amount of drug left in his body at 7:00 pm is 315.7 mg.
Explanation:
First, we need to find the amount of drug in the body at 90 min by using the exponential decay equation:

Where:
λ: is the decay constant = 
: is the half-life of the drug = 3.5 h
N(t): is the quantity of the drug at time t
N₀: is the initial quantity
After 90 min and before he takes the other 200 mg pill, we have:

Now, at 7:00 pm we have:

Therefore, the amount of drug left in his body at 7:00 pm is 315.7 mg (from an initial amount of 400 mg).
I hope it helps you!
Answer:
This would be Water
Explanation:
The reactants for photosynthesis is light or energy from the sun, carbon dioxide which is what plants breath, and chlorophyll for channeling the energy of the sun into chemical energy.
the rest of the answers is the products of photosynthesis not the reactants.
If you have any questions feel free to ask in the comments - Mark
ALSO Happy Valentines Day ❤
C. alpha = nucleus of a helium atom
beta = electron
gamma = photon
there are 4 atoms in aluminum chloride